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module layout
implicit none
integer, parameter::line_type_text = 1
integer, parameter::line_type_preformatted = 2
integer, parameter::line_type_link = 3
integer, parameter::line_type_indicator = 99
type::line
character(len=:), allocatable::text
integer::line_type
type(line), pointer::next
end type line
contains
subroutine layout_lines(first_line, rendering_engine)
use render
implicit none
type(line), pointer::first_line
class(renderer)::rendering_engine
type(line), pointer::walker
logical::laying_out
walker => first_line
laying_out = .true.
call rendering_engine%prepare_for_layout()
do while(laying_out)
select case (walker%line_type)
case (line_type_text)
call render_proportional(rendering_engine, walker%text)
case (line_type_preformatted)
call render_preformatted(rendering_engine, walker%text)
case (line_type_link)
call render_link(rendering_engine, walker%text)
end select
laying_out = associated(walker%next)
if(laying_out) then
walker => walker%next
end if
end do
end subroutine layout_lines
subroutine free_lines(first_line)
implicit none
type(line), intent(inout), pointer::first_line
type(line), pointer::walker, past
walker => first_line
do while(associated(walker))
if(allocated(walker%text)) then
deallocate(walker%text)
end if
past => walker
walker => walker%next
deallocate(past)
end do
first_line => null()
end subroutine free_lines
end module layout
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